Joseph, i agree 100%. there’s a difference between not being in favor and banning. Last year they banned. this year they did not. No gadol would endorse the “all-you-can-eat” nights at restaurants, as it is a violation of “kedoshim tihyu”, but they don’t ban it. If you would ask your rebbe, he would tell you not to do it, but you don’t make bans that cause a zilusa debei dina, like last year’s concert ban did. If you’ll argue that it didn’t, then feel free to speak to a local shul rov who will tell you the damage it caused. Many people who had no problem following Daas Torah had tremendous issues after that one. My rav confirmed this, the comments on the blogs confirm this, and the articles in various papers confirm this.
In short, I’m not saying it’s a mitzvah to go. But it’s not banned.